Level.



IMA. GEE. LEVEL. APPLIUATION FILED Dna-19,1911.

jggglm I PatentedJune16,1914..

@Hamme-w containing' vided with inclined walls, the said Walls be DAVID ALBERT GEE, OF PORTLAND, OREGON.

LEVEL.

Specicaton of Letters Patent. application tiled December 19, 1911.

Patented June 16, 1914. Serial No. 666,647.

.To all whom it may concern Be it known that I, DAVID ALBERT Glen, a citizen ot the United States, residing at Portland, in the county of Multnomah and Stale of Oregon, have invented new and use- `ful .lniirovements in Levels, oi which' the following is a speciticatioii.

This invention relates to improvements in spiritlevels. i

.l'he object ci the invention is to provide a level ot this character 'which is simple in construction, which provides means whereby theicvaporation of the liquid Within the level may be compensated for by an adjusting element, which can be manufactured at a small cost, and which il' desired may be yapplied to a degree instrui'nent by simply attaching a pair of level sights to the body of the level.

l also aim to provide a level with a liquid box having a side opening proing graduated to mark the degrees of a lcircle upon one of the sides or faces of the box, and n'iitcr graduations upon the oppositc face of the-box, whereby the said de' grecs or graduations may be accurately determined according to the inclination of the level with relation to the level of the liquid within the box.

For the purpose of` explaining the invention, the accom ianying drawings illustrate a satisfactory reduction of the same device, but the important instrumentalities thereof may be variedfand it is to be understood that thc invention is not limited to the specific arrangement and lorganization shown and.

described.

In the drawings, Figure 41 is a side elevan tion ot a level. constructed in accordance wi th the present invention and showing the saine employed as a' degree instrument. Fig. 2 is a central longitudinal sectional View taken upon the line 2-2 of Fig. l. Fig. 3 is a view looking toward one of the faces of the level box. Fig.` t is a vievT looking toward the opposite tace of the saine. Fig.

ii a sectional `View taken at aright-angle to that illustrated in Fig. 2. i

Referring now to the drawings in detail the numeral designates a rectangular member forming the body of the level, In the device illustrated in Fig. 1 of the drawings the said body has one of its'longiludinal edges provided with a and 3, in this instance the level is employed for surveying, and the level bodyy is ccn threads of the said rings.

pair of level sights 2' tal position.

lrally provided with aV circular opening 4 within which is an annular level box 5. The box 5 comprises a -being centrally formed with an integrally provided inwardly extending angular iiange 7.

The numerals 8 and 9 designate transparent plates, preferably glass, which are arrangedl adjacent the opposite faces of the fiange 7. .lnterposed between the said plates and the-flangeare gaskets 10, the same coinp'rising compressible rings of a width approximately equaling that of the flange 7. The numerals 11 and 12 designate similar gaskets which are arranged upon the outer faces ot' the transparent plates 8 and 9, and the said plates flange 7 through the medium of sustaining rings or Washers 13 and 14. The bore of the are normally sustained `tightly against the gaskets and against the ring member 6, the same ring member 6 preferably threaded upon the opposite sides ot' its central .flange 7 and the' outer edges oi' the washers also preferably threaded to co-act with the The Washers may be thus sustained in proper relation to the transparent plates 8 and 9 as well as to the gaskets for the plates. However, if desired other means may be employed with equal efficiency for securing the said washers to the ring or box 5.

The numerals 15 blocks each of which is provided with centrally flared or cone-shaped openings designated by the numerals 17 and 18. The outer edges of these blocks may be, and are pref erably threaded to engage with the threads of the ring member 6 of the box to engage with the washers. The blocks 15 and .i6 are preferably constructed of wood and eac-h provide upon their outer Afaces as well as upon their cone-shaped openings with metallic reinforcements or faces, designated by the numerals cone-shaped depressed portion of the facing ofthe block 16 is provided with graduations marking the degrees of a circle as clearly illustrated in Fig. u reference to this ligure it will be noted that these graduations are arranged upon the op-v and 16 designate annular i 19 and 20 respectively. TheV 13 and 14, are

3 of the drawings. Bv

posite quadrants of the circle provided by?.V

the annular-cone-shaped dependingportionof the face 19, so that the zero marks are arranged directly opposite each other when the level body is sustained in say a horizon? The facing 20 has its annular cone-shaped depressed portion provided with miter graduations which are arranged in the diametrically opposite quadrants of the circle provided by the said cone-shaped member, as clearly shown in Figs. 1 and 4 of the drawings,` the Zero .or horizontal and vertical marks are arranged diametrically opposite each other as in the case of the degrees of the circle heretofore described.

Each of the plates 18 and 19 is provided with oppositcly arranged elongated concentrie slots or openings Jl and 22, the same adapted to receive the threaded -portions of headed elements 23 and 21, and the threads of the said elements are adapted to co-act with the threads provided in depressed openings or slots termed in the opposite-faces of the ring member rl`he heads of the said elements are adapted to contact with the plates adjacent the edges provided by the concentric slots il and 22 so as to sustain the plates 1t) and 2t) in proper position upon the ring G. By this arrangement it will be noted that either o'tthe casings 1t) or 20 may be rotated so as to regulate any inaccuracy which may occur through the rough usage ofthe level.

The ring is preferably provided with oppositely disposed ears 25 and 26, the same having suitable openings, the outer portions of which are counter-sunk to provide or'the reception ol'` an ordinary securing element such as a screw 27, whereby the box 5 is re tained upon the angular body '1. lt 1s, ot'

coupe, to be understood that the said body is provided with suitable depressions to receive the ears 'so that the ears will lie flush with the i'ace of the body.

'lhe body l, well as the collar and tiange 7 thereof are provided with registering openings, the same being threaded for the reception of a screw member 28. The opening in the body has its outer portion either enlarged or flared to receive the head of the said screw member, so that the same will be sustained at all times below the surface of the edge of the level, and which at the same time provides for the entrance of a suitable instrumentl Winneby the screw mav.

be rotated in either direction. The screw 2S may have an outer facing '28 of comprcssible material which is adapted to serve as means for preventing the liquid within the liquid chamber from escaping between the threads of the screw and the threads of the collar of the body. This screw is of course removable and the liquid may be inserted within the chamber through the opening in the ring and body. The screw not only serves as means for closing the said openings but also for adjusting the liquid in the chamber, that is when the screwvis turned. in one direction it will force a certain quantity of liquid out et the openings and into the chamber so as to y bring the level of the said liquid to register with the zero marks upon the box 5 or il' a greater quantity of liquid than necessary is inserted within the chamber the screw will be rotated in the opposite direction, and the liquid will consequfntly fall as a portion thereof occupies the openings ior the screw.

llaving thus described the invention what 1 claim is A level having its stock provided with a circular opening, a circular box removably secured within the opening, said box being centrally provided with an integrally formed inwardly extending annular tiange, the inner wall. of the box to the opposite sides of the said tlangc being threaded, transparent plates within the box, gaskets engaging the outer iaces of the plates, block members comprising threaded. rings provided with coneshaped openings engaging with the threads 'of the box to compress the gaskets against the transparent plates. metallic graduated tace plates for the blocks and adj ustably connected with the rings, the box having a tlr'eadtal opening which passes through its annular flange, and a screw engaging with the threads oi the opening to normally close the said opening.

vIn testimony whereof I aflix my signature in presence of two witnesses.

BERT GRE.

Witnesses Giras. F. DUNN,

F. L. BLANCHARD. 

